What is your budget? I bought an
Antec Sonata case and a
Thermaltake Silent Boost heatsink.
Total fans, 1-120mm case fan, 1-80mm temp regulated ps fan, 1-80mm heatsink fan. While it isn't dead silent, it is pretty quiet. I have an AMD 1800+ as well and my current temps are 42 proc, 32 case.
Much better than the box I had before that sounded like it was trying to take off.
Anyone have experience with this acoustipack material? $70 to outfit my sonota with it. I bit dear... but if it gets a rave review I may jump on it.